Polypropylene composite stretched film

Details Polypropylene composite stretched film Polypropylene composite stretched film

1986-12-22

1988-04-26

Buffalow, Edith

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

428500, 428516, 428910, 5263481, B32B 2700

Patent

active

047404213

ABSTRACT:
A polypropylene composite stretched film having superior low-temperature heat-sealing characteristics, transparency and anti-block properties is provided, which film comprises as a base layer, a crystalline polypropylene and as a heat-sealing layer, a crystalline ethylene-propylene random copolymer containing 1 to 5% by weight of polymers having a molecular weight (Mw) of 6,000 or less and 3 to 5% by weight of ethylene, or a crystalline ethylene-propylene-butene-1 copolymer containing 1 to 5% by weight of polymers having a Mw of 6,000 or less, 1 to 10% by weight of ethylene and 4 to 30% by weight of butene-1.

REFERENCES:
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patent: 4297415 (1981-10-01), Ward et al.
patent: 4302504 (1981-11-01), Lansbury et al.
patent: 4303708 (1981-12-01), Gebhardt et al.
patent: 4339498 (1982-07-01), Weiner
patent: 4340641 (1982-07-01), Weiner
patent: 4380567 (1983-04-01), Shigemoto
patent: 4384024 (1983-05-01), Mitchell et al.
patent: 4410672 (1983-10-01), Inazawa

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